Bellatrix was our Brown Newfoundland dog.

Bellatrix, the "Female Warrior",
or the Amazon Star; from the Arabic, Al Najid, "the Conqueror".
Also called Yad al-Jauza', "Hand of Orion".
Bellatrix is also the 22nd
brightest star in the night sky. A pale yellow star marking the left
shoulder of Orion.

The dog "Nana" in James M. Barrie's Peter Pan was a Newfoundland dog.

The Newfoundland is a breed of large dog. Newfoundland dogs can be black, brown, gray, or black and white. They are known for their giant size, tremendous strength, calm dispositions, and loyalty. Newfoundland dogs excel at water rescue/lifesaving due to their muscular build, thick double coat, webbed feet, and innate swimming abilities.